| 1 | /* MIN, MAX macros.
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| 2 | Copyright (C) 1995, 1998, 2001, 2003, 2005, 2009-2021 Free Software
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| 3 | Foundation, Inc.
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| 4 |
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| 5 | This file is free software: you can redistribute it and/or modify
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| 6 | it under the terms of the GNU Lesser General Public License as
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| 7 | published by the Free Software Foundation; either version 2.1 of the
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| 8 | License, or (at your option) any later version.
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| 9 |
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| 10 | This file is distributed in the hope that it will be useful,
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | GNU Lesser General Public License for more details.
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| 14 |
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| 15 | You should have received a copy of the GNU Lesser General Public License
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| 16 | along with this program. If not, see <https://www.gnu.org/licenses/>. */
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| 17 |
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| 18 | #ifndef _MINMAX_H
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| 19 | #define _MINMAX_H
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| 20 |
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| 21 | /* Note: MIN, MAX are also defined in <sys/param.h> on some systems
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| 22 | (glibc, IRIX, HP-UX, OSF/1). Therefore you might get warnings about
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| 23 | MIN, MAX macro redefinitions on some systems; the workaround is to
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| 24 | #include this file as the last one among the #include list. */
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| 25 |
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| 26 | /* Before we define the following symbols we get the <limits.h> file
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| 27 | since otherwise we get redefinitions on some systems if <limits.h> is
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| 28 | included after this file. Likewise for <sys/param.h>.
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| 29 | If more than one of these system headers define MIN and MAX, pick just
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| 30 | one of the headers (because the definitions most likely are the same). */
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| 31 | #if HAVE_MINMAX_IN_LIMITS_H
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| 32 | # include <limits.h>
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| 33 | #elif HAVE_MINMAX_IN_SYS_PARAM_H
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| 34 | # include <sys/param.h>
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| 35 | #endif
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| 36 |
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| 37 | /* Note: MIN and MAX should be used with two arguments of the
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| 38 | same type. They might not return the minimum and maximum of their two
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| 39 | arguments, if the arguments have different types or have unusual
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| 40 | floating-point values. For example, on a typical host with 32-bit 'int',
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| 41 | 64-bit 'long long', and 64-bit IEEE 754 'double' types:
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| 42 |
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| 43 | MAX (-1, 2147483648) returns 4294967295.
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| 44 | MAX (9007199254740992.0, 9007199254740993) returns 9007199254740992.0.
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| 45 | MAX (NaN, 0.0) returns 0.0.
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| 46 | MAX (+0.0, -0.0) returns -0.0.
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| 47 |
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| 48 | and in each case the answer is in some sense bogus. */
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| 49 |
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| 50 | /* MAX(a,b) returns the maximum of A and B. */
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| 51 | #ifndef MAX
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| 52 | # define MAX(a,b) ((a) > (b) ? (a) : (b))
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| 53 | #endif
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| 54 |
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| 55 | /* MIN(a,b) returns the minimum of A and B. */
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| 56 | #ifndef MIN
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| 57 | # define MIN(a,b) ((a) < (b) ? (a) : (b))
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| 58 | #endif
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| 59 |
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| 60 | #endif /* _MINMAX_H */
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